CA3084146A1 - Drum mounted, on-demand fluid transfer pump - Google Patents
Drum mounted, on-demand fluid transfer pump Download PDFInfo
- Publication number
- CA3084146A1 CA3084146A1 CA3084146A CA3084146A CA3084146A1 CA 3084146 A1 CA3084146 A1 CA 3084146A1 CA 3084146 A CA3084146 A CA 3084146A CA 3084146 A CA3084146 A CA 3084146A CA 3084146 A1 CA3084146 A1 CA 3084146A1
- Authority
- CA
- Canada
- Prior art keywords
- fluid
- transfer pump
- demand
- magnetic sensor
- fluid transfer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 239000012530 fluid Substances 0.000 title claims abstract description 114
- 238000012546 transfer Methods 0.000 title claims abstract description 33
- 238000004891 communication Methods 0.000 claims description 12
- 230000005355 Hall effect Effects 0.000 claims description 6
- 235000014676 Phragmites communis Nutrition 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 4
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 3
- 239000004202 carbamide Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 239000003921 oil Substances 0.000 description 9
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- -1 for example Substances 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
- F04D15/0209—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid
- F04D15/0218—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid the condition being a liquid level or a lack of liquid supply
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/04—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes for transferring fuels, lubricants or mixed fuels and lubricants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/06—Details or accessories
- B67D7/58—Arrangements of pumps
- B67D7/62—Arrangements of pumps power operated
- B67D7/66—Arrangements of pumps power operated of rotary type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C13/00—Adaptations of machines or pumps for special use, e.g. for extremely high pressures
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
- F04C14/06—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations specially adapted for stopping, starting, idling or no-load operation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C5/00—Rotary-piston machines or pumps with the working-chamber walls at least partly resiliently deformable
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D1/00—Apparatus or devices for dispensing beverages on draught
- B67D1/08—Details
- B67D1/12—Flow or pressure control devices or systems, e.g. valves, gas pressure control, level control in storage containers
- B67D1/1247—Means for detecting the presence or absence of liquid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/02—Stopping, starting, unloading or idling control
- F04B49/022—Stopping, starting, unloading or idling control by means of pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
- F04D15/0209—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/0094—Structural association with other electrical or electronic devices
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Loading And Unloading Of Fuel Tanks Or Ships (AREA)
- Reciprocating Pumps (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Electromagnetic Pumps, Or The Like (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
An on-demand fluid transfer pump, comprising: a power head removably connectable on top of a stem that is removably connectable to a fluid supply; wherein the power head comprises an electric pump and a flow control unit configured to automatically switch the electric pump on and off; wherein the flow control unit comprises a magnetic sensor; and wherein the stem comprises: a suction tube, a fluid chamber, a plunger chamber, and a magnetic plunger reciprocable within the plunger chamber in response to pressure changes in the fluid chamber, wherein the magnetic plunger is biased to deactuate the magnetic sensor to switch on the electric pump to pressurise the fluid supply for delivery to the fluid dispenser; and wherein the magnetic plunger is pushed when pressure in the fluid chamber rises to thereby actuate the magnetic sensor to switch off the electric pump.
Description
DRUM MOUNTED, ON-DEMAND FLUID TRANSFER PUMP
Field [0001] The present invention relates to a drum mounted, on-demand fluid transfer pump.
Background
Field [0001] The present invention relates to a drum mounted, on-demand fluid transfer pump.
Background
[0002] Industrial fluids, such as engine or gearbox oils, are typically transferred from bulk fluid containers, such as drums, to dispensing points, such as car engines or gearboxes, using hoses, hand-actuated pumps and trigger-operated dispensing guns.
[0003] Conventional arrangements for transferring industrial fluids from drums have several drawbacks. It is difficult to coordinate the use of the hand-actuated pumps and trigger-operated dispensing guns resulting in spillage and overfilling. In addition, the hoses between the drums and the hand-actuated pumps are untidy and prone to leaking.
[0004] In this context, there is a need for improved fluid transfer pumps.
Summary
Summary
[0005] According to the present invention, there is provided an on-demand fluid transfer pump, comprising:
a power head removably connectable on top of a stem that is removably connectable to a fluid supply;
wherein the power head comprises an electric pump and a flow control unit configured to automatically switch the electric pump on and off;
wherein the flow control unit comprises a first magnetic sensor; and wherein the stem comprises:
a suction tube in fluid communication with the electric pump and the fluid supply;
a fluid chamber having an inlet in fluid communication with the fluid supply and an outlet in fluid communication with a fluid dispenser;
a plunger chamber in fluid communication with the fluid chamber between the inlet and the outlet; and a magnetic plunger reciprocable within the plunger chamber in response to pressure changes in the fluid chamber between a top position adjacently beneath the first magnetic sensor and a bottom position spaced away below the first magnetic sensor;
wherein the magnetic plunger is biased to the bottom position when pressure in the fluid chamber drops to thereby deactuate the first magnetic sensor to switch on the electric pump to pressurise the fluid supply for delivery to the fluid dispenser; and wherein the magnetic plunger is pushed to the top position when pressure in the fluid chamber rises to thereby actuate the first magnetic sensor to switch off the electric pump.
a power head removably connectable on top of a stem that is removably connectable to a fluid supply;
wherein the power head comprises an electric pump and a flow control unit configured to automatically switch the electric pump on and off;
wherein the flow control unit comprises a first magnetic sensor; and wherein the stem comprises:
a suction tube in fluid communication with the electric pump and the fluid supply;
a fluid chamber having an inlet in fluid communication with the fluid supply and an outlet in fluid communication with a fluid dispenser;
a plunger chamber in fluid communication with the fluid chamber between the inlet and the outlet; and a magnetic plunger reciprocable within the plunger chamber in response to pressure changes in the fluid chamber between a top position adjacently beneath the first magnetic sensor and a bottom position spaced away below the first magnetic sensor;
wherein the magnetic plunger is biased to the bottom position when pressure in the fluid chamber drops to thereby deactuate the first magnetic sensor to switch on the electric pump to pressurise the fluid supply for delivery to the fluid dispenser; and wherein the magnetic plunger is pushed to the top position when pressure in the fluid chamber rises to thereby actuate the first magnetic sensor to switch off the electric pump.
[0006] The first magnetic sensor may comprise a Hall effect sensor.
[0007] The first magnetic sensor may comprise a reed switch.
[0008] The first magnetic sensor may be fluidly isolated in a fluid-tight compartment within the power head.
[0009] The fluid supply may comprise a drum.
[0010] The stem may be removably mountable directly on the drum.
[0011] The fluid dispenser may comprise a trigger-operated dispensing gun.
[0012] The power head may further comprise a rechargeable battery to power the electric pump.
[0013] The power head may further comprise a locking mechanism having a handle, wherein the power head is lockably connected on top of the stem by pushing the handle down, and disconnected from the stem by pulling the handle up.
[0014] The flow control unit may further comprise a second magnetic sensor configured to detect that the power head is connected on top of the stem.
[0015] The flow control unit may be further configured to prevent the electric pump from being switched on if the second magnetic sensor does not detect that the power head is connected on top of the stem.
[0016] The second magnetic sensor may comprise a Hall effect sensor.
[0017] The second magnetic sensor may comprise a reed switch.
[0018] The flow control unit may be further configured to prevent the electric pump from being switched on if the handle is not pushed down to thereby lock the power head on top of the stem.
[0019] The flow control unit may comprise pressure control circuitry and detection circuitry on a printed circuit board.
[0020] The first and second magnetic sensors may be provided on the printed circuit board.
[0021] The fluid supply may comprise a supply of an industrial fluid comprising, for example, oil or aqueous urea solution.
[0022] The present invention also provides a method of transferring fluid from a fluid supply to a fluid dispenser using the on-demand fluid transfer pump described above.
Brief Description of Drawings
Brief Description of Drawings
[0023] Embodiments of the invention will now be described by way of example only with reference to the accompanying drawings, in which:
Figure 1 is an assembled perspective view of an on-demand fluid transfer pump according to an embodiment of the present invention;
Figure 2 is a partially exploded perspective view of the on demand fluid transfer pump;
Figures 3 to 6 are schematic section views of the on demand fluid transfer pump at different stages of operation illustrating an operating cycle of the on demand fluid transfer pump; and Figure 7 is a functional block diagram of an embodiment of a fluid control unit of the on-demand fluid transfer pump.
Description of Embodiments
Figure 1 is an assembled perspective view of an on-demand fluid transfer pump according to an embodiment of the present invention;
Figure 2 is a partially exploded perspective view of the on demand fluid transfer pump;
Figures 3 to 6 are schematic section views of the on demand fluid transfer pump at different stages of operation illustrating an operating cycle of the on demand fluid transfer pump; and Figure 7 is a functional block diagram of an embodiment of a fluid control unit of the on-demand fluid transfer pump.
Description of Embodiments
[0024] Referring to Figures 1 and 2, an embodiment of an on-demand fluid transfer pump 10 according to the present invention generally comprises a power head 12 that is removably connectable on top of a stem 14 which is removably connectable to a fluid supply 16. The fluid supply 16 may, for example comprise a 20L drum. The stem may be removably mountable directly on the drum 16. The fluid supply may comprise an industrial fluid, for example, oil or aqueous urea solution.
[0025] The power head 12 may further comprise a locking mechanism (not shown) having a handle 18. The power head 12 may be lockably connected on top of the stem 14 by pushing the handle 18 down (Figure 1), and disconnected from the stem 14 by pulling the handle 18 up (Figure 2).
[0026] Referring to Figures 3 to 6, the power head 12 may comprise an electric pump 20 and a flow control unit 22 that is configured to automatically switch the electric pump 20 on and off. The flow control unit 22 may comprise a first magnetic sensor 23.
The electric pump 20 may comprise a flexible impeller pump driven by a DC brushed motor having a direct-drive configuration (ie, no gearbox) for smooth and quiet operation. The flexible impeller may allow for reliable self-priming of the electric pump 20.
The power head 12 may further comprise a rechargeable battery (not shown) to power the electric pump 20. The rechargeable battery may, for example, comprise an 18V DC lithium ion battery. The power head 12 may be actuated for automatic operation of the electric pump 20 by a rocker switch 24.
The electric pump 20 may comprise a flexible impeller pump driven by a DC brushed motor having a direct-drive configuration (ie, no gearbox) for smooth and quiet operation. The flexible impeller may allow for reliable self-priming of the electric pump 20.
The power head 12 may further comprise a rechargeable battery (not shown) to power the electric pump 20. The rechargeable battery may, for example, comprise an 18V DC lithium ion battery. The power head 12 may be actuated for automatic operation of the electric pump 20 by a rocker switch 24.
[0027] The first magnetic sensor 23 may comprise a Hall effect sensor or a reed switch.
The first magnetic sensor 23 may be fluidly isolated in a fluid-tight compartment 26 within the power head 12. The first magnetic sensor 23 may be provided on a printed circuit board 27 within the fluid-tight compartment 26.
The first magnetic sensor 23 may be fluidly isolated in a fluid-tight compartment 26 within the power head 12. The first magnetic sensor 23 may be provided on a printed circuit board 27 within the fluid-tight compartment 26.
[0028] The stem 14 may comprise a suction tube 28 in fluid communication with the electric pump 18 and the fluid supply 16. The stem 14 may further comprise a fluid chamber 30 having an inlet 32 in fluid communication with the fluid supply 16 and an outlet 34 in fluid communication with a fluid dispenser (not shown). The fluid dispenser may, for example, comprise a trigger-operated dispensing gun.
[0029] The stem 14 may further comprise a plunger chamber 36 in fluid communication with the fluid chamber 30 between the inlet 32 and the outlet 34. A magnetic plunger (or piston) 38 may be reciprocable within the plunger chamber 36 in response to pressure changes in the fluid chamber 30 between a top position adjacently beneath the first magnetic sensor 23 and a bottom position spaced away below the first magnetic sensor 23. The magnetic plunger 38 may comprise a rod 40 having a permanent magnet 42 at a top end, and a diaphragm 44 at a bottom end. The magnetic plunger 38 may be biased toward the bottom position by a spring 46. An outlet check valve 48 and an inlet check valve (not shown) are provided between the fluid chamber 30 and the fluid supply 16 to maintain the fluid chamber 30 in a primed condition.
[0030] Referring to Figure 4, the magnetic plunger 38 is biased to the bottom position in the plunger chamber 36 by the spring 46 when pressure in the fluid chamber 30 drops to thereby deactuate the first magnetic sensor 23 to switch on the electric pump 20 to pressurise the fluid supply for delivery to the fluid dispenser, for example when the trigger-operated dispensing gun is open.
[0031] Referring to Figures 5 and 6, the magnetic plunger 38 is pushed to the top position in the plunger chamber 36 when pressure in the fluid chamber 30 rises, for example when the trigger-operated dispensing gun is closed, to thereby actuate the first magnetic sensor 23 to switch off the electric pump 20. The outlet check valve 48 closes to maintain the fluid in the fluid chamber 30 in a primed condition with the electric pump 20 switched off until the trigger-operated dispensing gun is re-opened for use.
[0032] In use, the flow control unit 22 of the on-demand fluid transfer pump 10 senses the position of the trigger of the dispensing gun through changes in pressure levels in the fluid chamber 30 and the electric pump 20 is automatically switched on and off. For example, the electric pump 20 is automatically switched on when the dispensing gun trigger is pulled, and automatically switched off when the dispensing gun trigger is released.
[0033] Referring to Figure 7, the flow control unit 22 may comprise a second magnetic sensor 25 configured to detect that the power head 12 is connected on top of the stem 14. A second permanent magnet (not shown) may be positioned on the stem 14 so that it comes within a detection distance of the second magnetic sensor 25 only when the power head 12 sits on top of the stem 14. The second magnetic sensor 25 may comprise a Hall effect sensor or a reed switch. The flow control unit 22 may be further configured to prevent the electric pump 20 from being switched on if the second magnetic sensor 25 does not detect that the power head 12 is connected on top of the stem 14.
[0034] The flow control unit 22 may be further configured to prevent the electric pump 20 from being switched on if the handle 18 is not pushed down to thereby lock the power head 12 on top of the stem 14. The flow control unit 22 may comprise pressure control circuitry 29 and detection circuitry 31 on the printed circuit board within the fluid-tight compartment 26. The second magnetic sensor 25 may also be provided on the printed circuit board 27.
[0035] Embodiments of the present invention provide a drum mounted, on-demand fluid transfer pump that is both generally and specifically useful for transferring industrial fluids, such as engine or gearbox oils, from bulk fluid containers, such as drums, to dispensing points, such as car engines or gearboxes, using fluid dispensers, such as trigger-operated dispensing guns. The modular design of embodiments of the invention enables one power head to be used with multiple stems. Each stem may be used on an individual oil drum to avoid oil contamination. The automatic switching of the electric pump provided by the pressure-controlled magnetic switch is easier to use than a hand-actuated pump. There is no need to manually actuate the pump which means that a user's eyes can be constantly kept on the dispensing point to avoid or minimise oil overflow or spillage. The stem mounts directly on top of the oil drum and comprises a suction tube that is inserted into the oil drum. This avoids the need for hoses resulting in a setup that is tidier and safer compared to conventional arrangements.
[0036] For the purpose of this specification, the word "comprising" means "including but not limited to," and the word "comprises" has a corresponding meaning.
[0037] The above embodiments have been described by way of example only and modifications are possible within the scope of the claims that follow.
Claims (18)
1. An on-demand fluid transfer pump, comprising:
a power head removably connectable on top of a stem that is removably connectable to a fluid supply;
wherein the power head comprises an electric pump and a flow control unit configured to automatically switch the electric pump on and off;
wherein the flow control unit comprises a first magnetic sensor; and wherein the stem comprises:
a suction tube in fluid communication with the electric pump and the fluid supply;
a fluid chamber having an inlet in fluid communication with the fluid supply and an outlet in fluid communication with a fluid dispenser;
a plunger chamber in fluid communication with the fluid chamber between the inlet and the outlet; and a magnetic plunger reciprocable within the plunger chamber in response to pressure changes in the fluid chamber between a top position adjacently beneath the first magnetic sensor and a bottom position spaced away below the first magnetic sensor;
wherein the magnetic plunger is biased to the bottom position when pressure in the fluid chamber drops to thereby deactuate the first magnetic sensor to switch on the electric pump to pressurise the fluid supply for delivery to the fluid dispenser; and wherein the magnetic plunger is pushed to the top position when pressure in the fluid chamber rises to thereby actuate the first magnetic sensor to switch off the electric pump.
a power head removably connectable on top of a stem that is removably connectable to a fluid supply;
wherein the power head comprises an electric pump and a flow control unit configured to automatically switch the electric pump on and off;
wherein the flow control unit comprises a first magnetic sensor; and wherein the stem comprises:
a suction tube in fluid communication with the electric pump and the fluid supply;
a fluid chamber having an inlet in fluid communication with the fluid supply and an outlet in fluid communication with a fluid dispenser;
a plunger chamber in fluid communication with the fluid chamber between the inlet and the outlet; and a magnetic plunger reciprocable within the plunger chamber in response to pressure changes in the fluid chamber between a top position adjacently beneath the first magnetic sensor and a bottom position spaced away below the first magnetic sensor;
wherein the magnetic plunger is biased to the bottom position when pressure in the fluid chamber drops to thereby deactuate the first magnetic sensor to switch on the electric pump to pressurise the fluid supply for delivery to the fluid dispenser; and wherein the magnetic plunger is pushed to the top position when pressure in the fluid chamber rises to thereby actuate the first magnetic sensor to switch off the electric pump.
2. The on-demand fluid transfer pump of claim 1, wherein the first magnetic sensor comprises a Hall effect sensor.
3. The on-demand fluid transfer pump of claim 1, wherein the first magnetic sensor comprises a reed switch.
4. The on-demand fluid transfer pump of claim 1, wherein the first magnetic sensor is fluidly isolated in a fluid-tight compartment within the power head.
5. The on-demand fluid transfer pump of claim 1, wherein the fluid supply comprises an oil drum.
6. The on-demand fluid transfer pump of claim 5, wherein the stem is removably mountable directly on the oil drum.
7. The on-demand fluid transfer pump of claim 5, wherein the fluid dispenser comprises a trigger-operated dispensing gun.
8. The on-demand fluid transfer pump of claim 1, wherein the power head further comprises a rechargeable battery to power the electric pump.
9. The on-demand fluid transfer pump of claim 1, wherein the power head further comprises a locking mechanism having a handle, and wherein the power head is lockably connected on top of the stem by pushing the handle down, and disconnected from the stem by pulling the handle up.
10. The on-demand fluid transfer pump of claim 1, wherein the flow control unit further comprises a second magnetic sensor configured to detect that the power head is connected on top of the stem.
11. The on-demand fluid transfer pump of claim 10, wherein the flow control unit is further configured to prevent the electric pump from being switched on if the second magnetic sensor does not detect that the power head is connected on top of the stem.
12. The on-demand fluid transfer pump of claim 10, wherein the second magnetic sensor comprises a Hall effect sensor.
13. The on-demand fluid transfer pump of claim 10, wherein the second magnetic sensor may comprise a reed switch.
14. The on-demand fluid transfer pump of claim 9, wherein the flow control unit is further configured to prevent the electric pump from being switched on if the handle is not pushed down to thereby lock the power head on top of the stem.
15. The on-demand fluid transfer pump of claim 10, wherein the flow control unit comprises pressure control circuitry and detection circuitry on a printed circuit board.
16. The on-demand fluid transfer pump of claim 15, wherein the first and second magnetic sensors are provided on the printed circuit board.
17. The on-demand fluid transfer pump of claim 1, wherein the fluid supply comprises a supply of oil or aqueous urea solution.
18. A method of transferring fluid from a fluid supply to a fluid dispenser using the on-demand fluid transfer pump of any one of claims 1 to 17.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2017904870 | 2017-12-04 | ||
| AU2017904870A AU2017904870A0 (en) | 2017-12-04 | Drum mounted, on-demand fluid transfer pump | |
| PCT/AU2018/050922 WO2019109128A1 (en) | 2017-12-04 | 2018-08-29 | Drum mounted, on-demand fluid transfer pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA3084146A1 true CA3084146A1 (en) | 2019-06-13 |
Family
ID=66749991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA3084146A Pending CA3084146A1 (en) | 2017-12-04 | 2018-08-29 | Drum mounted, on-demand fluid transfer pump |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US10808687B1 (en) |
| EP (1) | EP3720806B1 (en) |
| JP (1) | JP7191953B2 (en) |
| CN (1) | CN111629990B (en) |
| AU (1) | AU2018381333B2 (en) |
| CA (1) | CA3084146A1 (en) |
| NZ (1) | NZ764374A (en) |
| SG (1) | SG11202004383PA (en) |
| TW (1) | TWI787337B (en) |
| WO (1) | WO2019109128A1 (en) |
| ZA (1) | ZA202003221B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USD1004623S1 (en) * | 2021-02-24 | 2023-11-14 | Graco Minnesota Inc. | Transfer pump |
| USD1019708S1 (en) * | 2023-09-29 | 2024-03-26 | Facai Liu | Stick pump cordless |
Family Cites Families (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2539862A (en) * | 1946-02-21 | 1951-01-30 | Wallace E Rushing | Air-driven turbine power plant |
| US3447109A (en) * | 1968-04-12 | 1969-05-27 | Shlesinger Jr Bernard E | Magnetic programming switches |
| US4101950A (en) * | 1976-11-08 | 1978-07-18 | Facet Enterprises, Inc. | Portable fluid transfer pump |
| JPS62142938A (en) * | 1985-12-18 | 1987-06-26 | Matsushita Seiko Co Ltd | Humidifier |
| JPH0768957B2 (en) * | 1986-08-29 | 1995-07-26 | 株式会社芝浦製作所 | Well pump |
| DE3724386A1 (en) * | 1987-07-23 | 1989-02-09 | Kaercher Gmbh & Co Alfred | High-pressure cleaning apparatus |
| US5529460A (en) * | 1993-07-28 | 1996-06-25 | Coleman Powermate, Inc. | Pressure washer with flow control switch |
| US5783451A (en) * | 1994-04-15 | 1998-07-21 | Van Praet; Peter | Pipetting unit and method for liquids |
| US5673732A (en) | 1995-07-11 | 1997-10-07 | Fe Petro Inc. | Variable speed pump-motor assembly for fuel dispensing system |
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-
2018
- 2018-08-29 CA CA3084146A patent/CA3084146A1/en active Pending
- 2018-08-29 EP EP18885566.2A patent/EP3720806B1/en active Active
- 2018-08-29 CN CN201880077873.9A patent/CN111629990B/en active Active
- 2018-08-29 NZ NZ764374A patent/NZ764374A/en unknown
- 2018-08-29 AU AU2018381333A patent/AU2018381333B2/en active Active
- 2018-08-29 WO PCT/AU2018/050922 patent/WO2019109128A1/en unknown
- 2018-08-29 SG SG11202004383PA patent/SG11202004383PA/en unknown
- 2018-08-29 US US16/642,876 patent/US10808687B1/en active Active
- 2018-08-29 JP JP2020526977A patent/JP7191953B2/en active Active
- 2018-08-31 TW TW107130549A patent/TWI787337B/en active
-
2020
- 2020-05-29 ZA ZA2020/03221A patent/ZA202003221B/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| TW201925624A (en) | 2019-07-01 |
| US20200347839A1 (en) | 2020-11-05 |
| AU2018381333A1 (en) | 2020-03-12 |
| SG11202004383PA (en) | 2020-06-29 |
| EP3720806A1 (en) | 2020-10-14 |
| CN111629990B (en) | 2022-12-06 |
| JP2021505807A (en) | 2021-02-18 |
| EP3720806A4 (en) | 2021-09-01 |
| NZ764374A (en) | 2024-12-20 |
| AU2018381333B2 (en) | 2020-03-19 |
| CN111629990A (en) | 2020-09-04 |
| WO2019109128A1 (en) | 2019-06-13 |
| JP7191953B2 (en) | 2022-12-19 |
| TWI787337B (en) | 2022-12-21 |
| ZA202003221B (en) | 2021-08-25 |
| US10808687B1 (en) | 2020-10-20 |
| EP3720806B1 (en) | 2023-10-25 |
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